证实了--没症状的感染者可以传染他人
Wuhan coronavirus can be spread even without symptoms, top US infectious disease doctor says
https://www.cnn.com/asia/live-news/coronavirus-outbreak-01-31-20-intl-hnk/index.html
https://www.cnn.com/asia/live-news/coronavirus-outbreak-01-31-20-intl-hnk/index.html